Sun Damage
The sun is one of the major culprits for wrinkles. Many have found that when they spent too much time sunbathing in their youth and now suffer from serious wrinkles. Light emitted by the sun covers the complete spectrum of light, and so while your skin is exposed to necessary light, it is also exposed to harmful light. Scientists have found that there are two frequencies of light in the ultraviolet bald: UVA and UVB rays. These hit the outer layer of the epidermis, and though some sunscreens tend to protect from one type, there is no requirement, at least previously, to protect from both.
Simply put, when you develop wrinkles due to sun exposure, they call it photo aging. It is the relationship between sun and wrinkles, and essentially the more exposure you experience, the faster your skin will age. Ultraviolet light basically breaks down the collagen and elastin cells that are important to your skin. The accumulation of this breakdown stops your skin from really renewing itself in many cases and therefore from keeping itself young and firm. Therefore, your skin may also start to sag. And many have found that unfortunately, while you can repair it to some degree, the repair is extensive and certainly not perfect. When you undergo prolonged exposure, the breakdown of collagen and elastin is often so great that full repair cannot be conducted. The efforts to repair may even ironically result in further breakdown of collagen cells. The resulting effect on the skin is known as a solar scar.
Now incase you’re thinking of spending all your time indoors and never seeing the rays of sunlight again, remember all things in moderation. You can suffer vitamin D deficiencies if you have no sunlight, and UV rays can be necessary and healthy to a certain degree. UVC is a good kind of UV ray. It is absorbed by the atmosphere, therefore not actually causing skin damage. However, UVB rays are those responsible for sunburns. The intensity of these rays varies by season. You can avoid the damage for the most part from UVB rays by simply staying out of the sun during high risk periods. However, UVA rays are the worst of the UV rays. It remains fairly constant throughout the day, and it can even penetrate glass. It penetrates deep into the skin and breaks down collagen, and this is one that could very well be considered to be the cancer UV ray.
So while you do need sun exposure, sunscreens will not shield you from 2 out of 3 of the UV rays, and it should not actually shield you from UVC. You want it to mainly shield you from UVA rays, but you also want it to shield you from UVB to avoid sunburn and certain amounts of skin damage.